Learn to secure your Django apps by attacking (and then securing) Pygoat - An intentionally vulnerable Python Django application. Explore the OWASP top 10 vulnerabilities and understand how to mitigate them from Django apps.
measures, technologies, or approaches aimed at safeguarding web servers, web applications, and web services, including APIs, against potential attacks from online threats. Its significance lies in safeguarding valuable data, customers, and organizations from data breaches, disruptions to business operations, or any adverse consequences stemming from cyber criminal activities.
million websites, SiteLock reports that websites currently experience an average of 172 attacks every day, and are visited by bots approximately 2,306 times a week. • Malicious bots represent over 60% of all bot traffic • Cyberattacks cost small and medium-Sized Businesses $25k annually on average • The volume of threats are doubling year over year Source: https://www.sitelock.com/resources/security-report
online community that produces freely-available articles, methodologies, documentation, tools, and technologies in the field of web application security OWASP provides tools and resources for security researchers as well as developers to test and fortify their applications.
report outlining security concerns for web application security, focusing on the 10 most critical risks. The report is put together by a team of security experts from all over the world.
how a web application grants access to content and functions to some users and not others. These checks are performed after authentication, and govern what ‘authorized’ users are allowed to do.
Implement access control mechanisms once and re-use them throughout the application, including minimizing Cross-Origin Resource Sharing (CORS) usage. • Model access controls should enforce record ownership rather than accepting that the user can create, read, update, or delete any record. • Unique application business limit requirements should be enforced by domain models. • Disable web server directory listing and ensure file metadata (e.g., .git) and backup files are not present within web roots. • Log access control failures, alert admins when appropriate (e.g., repeated failures). • Rate limit API and controller access to minimize the harm from automated attack tooling. • Stateful session identifiers should be invalidated on the server after logout. Stateless JWT tokens should rather be short-lived so that the window of opportunity for an attacker is minimized. For longer lived JWTs it's highly recommended to follow the OAuth standards to revoke access.
Sensitive Data Exposure. Enumerations (CWEs) included are CWE-259: Use of Hard-coded Password, CWE-327: Broken or Risky Crypto Algorithm, and CWE-331 Insufficient Entropy.
application. Identify which data is sensitive according to privacy laws, regulatory requirements, or business needs. • Don't store sensitive data unnecessarily. Discard it as soon as possible or use PCI DSS compliant tokenization or even truncation. Data that is not retained cannot be stolen. • Make sure to encrypt all sensitive data at rest. • Ensure up-to-date and strong standard algorithms, protocols, and keys are in place; use proper key management. • Encrypt all data in transit with secure protocols such as TLS with forward secrecy (FS) ciphers, cipher prioritization by the server, and secure parameters. Enforce encryption using directives like HTTP Strict Transport Security (HSTS). • Disable caching for response that contain sensitive data.
data and tricks the interpreter into doing things it shouldn't, like running unintended commands or accessing unauthorized data. Eg: SQL, NoSQL, OS command, Object Relational Mapping (ORM), LDAP, and Expression Language (EL) or Object Graph Navigation Library (OGNL) injection
API, which avoids using the interpreter entirely, provides a parameterized interface, or migrates to Object Relational Mapping Tools (ORMs). • Use positive server-side input validation. This is not a complete defense as many applications require special characters, such as text areas or APIs for mobile applications. • For any residual dynamic queries, escape special characters using the specific escape syntax for that interpreter. • Use LIMIT and other SQL controls within queries to prevent mass disclosure of records in case of SQL injection.
that can sit in the background of everything you do. This vulnerability relates to how you as a developer design your programs, architect solutions, and employ security practices such as threat modeling
per person ). And the movie will be public when all the tickets will be sold. The ticket generating system is inherently secure, limiting users to obtain a maximum of 5 free tickets. However, a significant design flaw exists – multiple accounts can be created to acquire an unlimited number of tickets. For instance, in this specific scenario where 60 tickets are required, one could easily exploit the system by creating just 12 accounts, claiming 5 tickets from each.
AppSec professionals to help evaluate and design security and privacy-related controls • Establish and use a library of secure design patterns or paved road ready to use components • Use threat modeling for critical authentication, access control, business logic, and key flows • Integrate security language and controls into user stories • Integrate plausibility checks at each tier of your application (from frontend to backend)
all critical flows are resistant to the threat model. Compile use-cases and misuse-cases for each tier of your application. • Segregate tier layers on the system and network layers depending on the exposure and protection needs • Segregate tenants robustly by design throughout all tiers • Limit resource consumption by user or service
application is: • Missing appropriate security hardening across any part of the application stack or improperly configured permissions on cloud services. • Unnecessary features are enabled or installed (e.g., unnecessary ports, services, pages, accounts, or privileges). • Default accounts and their passwords are still enabled and unchanged. • Error handling reveals stack traces or other overly informative error messages to users.
• Raw inputs from front end should not be trusted • If using headers to enforce access controls, should use encryption mechanism to preserve the secrecy of the key.
DEBUG=True is dumping lots of metadata from your environment, including the whole settings.py configurations, when a exception occurs. Can u trigger a 500 error and get the SENSITIVE_DATA ?
tracebacks, error messages and env variables being displayed to users. In a publicly accessible environment, Debug mode should be disabled using the below Django setting (settings.py): DEBUG = False
it fast and easy to deploy another environment that is appropriately locked down. This process should be automated to minimize the effort required to set up a new secure environment. • A minimal platform without any unnecessary features, components, documentation, and samples. Remove or do not install unused features and frameworks. • A task to review and update the configurations appropriate to all security notes, updates, and patches as part of the patch management process. Review cloud storage permissions (e.g., S3 bucket permissions). • An automated process to verify the effectiveness of the configurations and settings in all environments.
• If the software used is vulnerable, unsupported, or out of date. This includes the OS, web/application server, database management system (DBMS), applications, APIs and all components, runtime environments, and libraries. • If you do not scan for vulnerabilities regularly and subscribe to security bulletins related to the components you use. • If you do not fix or upgrade the underlying platform, frameworks, and dependencies in a risk-based, timely fashion. This commonly happens in environments when patching is a monthly or quarterly task under change control, leaving organizations open to days or months of unnecessary exposure to fixed vulnerabilities.
why components with known vulnerabilities can be a serious issue. The user on accessing the lab is provided with a feature to convert yaml files into json objects. A yaml file needs to be chosen and uploaded to get the json data. The app uses pyyaml 5.1 which is vulnerable to code execution.
documentation. • Continuously inventory the versions of both client-side and server-side components (e.g., frameworks, libraries) and their dependencies using tools like versions, OWASP Dependency Check, retire.js, etc. Continuously monitor sources like Common Vulnerability and Exposures (CVE) and National Vulnerability Database (NVD) for vulnerabilities in the components. Use software composition analysis tools to automate the process. Subscribe to email alerts for security vulnerabilities related to components you use. • Only obtain components from official sources over secure links. Prefer signed packages to reduce the chance of including a modified, malicious component (See A08:2021-Software and Data Integrity Failures).
way applications handle passwords and user logins is done incorrectly. This can let attackers get access to passwords, keys, or tokens, or take advantage of other mistakes in how the app works to pretend to be someone else, either for a little while or forever.
is to login as admin, for that we need to exploit the lack of rate limiting feature in the otp verification flow. You can see that the otp is only of 3 digit(for demo purposes) and the application doesn’t have any captcha (To disallow any automated scripts or bots) or any restrictions on the number of tries for the otp.
credential stuffing, brute force, and stolen credential reuse attacks. • Do not ship or deploy with any default credentials, particularly for admin users. • Implement weak password checks, such as testing new or changed passwords against the top 10,000 worst passwords list. • Ensure registration, credential recovery, and API pathways are hardened against account enumeration attacks by using the same messages for all outcomes. • Limit or increasingly delay failed login attempts, but be careful not to create a denial of service scenario. Log all failures and alert administrators when credential stuffing, brute force, or other attacks are detected.
failures relate to code and infrastructure that does not protect against integrity violations. An example of this is where an application relies upon plugins, libraries, or modules from untrusted sources, repositories, and content delivery networks (CDNs). Eg: Insecure Deserialization Applications and APIs will be vulnerable if they deserialize hostile or tampered objects supplied by an attacker. This can result in two primary types of attacks: • Object and data structure related attacks where the attacker modifies application logic or achieves arbitrary remote code execution if there are classes available to the application that can change behavior during or after deserialization. • Typical data tampering attacks such as access-control-related attacks where existing data structures are used but the content is changed.
from the url param. If we specify name value as: user+<script>document.getElementById("download_link").setAttribute("href"% 2C"%2Fstatic%2Ffake.txt")%3B<%2Fscript>user+<script>document.getElement ById("download_link").setAttribute("href"%2C"%2Fstatic%2Ffake.txt")%3B<%2F script> The download url is modified and user may download an arbitrary file by trusting the domain
user to a fake file. As a user we should always cross-check signatures for verification of Data Integrity. Checksums should be provided for downloads so that it can be cross checked from user end.
the software or data is from the expected source and has not been altered. • Ensure libraries and dependencies, are consuming trusted repositories. If you have a higher risk profile, consider hosting an internal known-good repository that's vetted. • Ensure that a software supply chain security tool, such as OWASP Dependency Check or OWASP CycloneDX, is used to verify that components do not contain known vulnerabilities • Ensure that your CI/CD pipeline has proper segregation, configuration, and access control to ensure the integrity of the code flowing through the build and deploy processes. • Ensure that unsigned or unencrypted serialized data is not sent to untrusted clients without some form of integrity check or digital signature to detect tampering or replay of the serialized data
help detect, escalate, and respond to active breaches. Without logging and monitoring, breaches cannot be detected. Insufficient logging, detection, monitoring, and active response occurs any time: • Auditable events, such as logins, failed logins, and high-value transactions, are not logged. • Warnings and errors generate no, inadequate, or unclear log messages. • Logs of applications and APIs are not monitored for suspicious activity. • Appropriate alerting thresholds and response escalation processes are not in place or effective. • Penetration testing and scans by dynamic application security testing (DAST) tools (such as OWASP ZAP) do not trigger alerts. • The application cannot detect, escalate, or alert for active attacks in real-time or near real-time.
failures can be logged with sufficient user context to identify suspicious or malicious accounts and held for enough time to allow delayed forensic analysis. Ensure that logs are generated in a format that log management solutions can easily consume. Ensure log data is encoded correctly to prevent injections or attacks on the logging or monitoring systems. Ensure high-value transactions have an audit trail with integrity controls to prevent tampering or deletion, such as append-only database tables or similar. DevSecOps teams should establish effective monitoring and alerting such that suspicious activities are detected and responded to quickly.
whenever a web application is fetching a remote resource without validating the user-supplied URL. It allows an attacker to coerce the application to send a crafted request to an unexpected destination. Sample usages for remote url fetching: DNS Checkers, URL previews on social media • Common attacks: Attacks on internal services/files, Attack on external URLs (DoS)
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